Heart repair breakthroughs replace surgeon's knife - 0 views
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Many problems that once required sawing through the breastbone and opening up the chest for open heart surgery now can be treated
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through a tube
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These minimal procedures used to be done just to unclog arteries and correct less common heart rhythm problems
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Now some patients are getting such repairs for valves, irregular heartbeats, holes in the heart and other defects—without major surgery
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Doctors even are testing ways to treat high blood pressure with some of these new approaches
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Instead of opening the chest, we're able to put catheters in through the leg, sometimes through the arm
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Many patients after having this kind of procedure in a day or two can go home
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It may lead to cheaper treatment, although the initial cost of the novel devices often offsets the savings from shorter hospital stays
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Not everyone can have catheter treatment, and some promising devices have hit snags in testing
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Others on the market now are so new that it will take several years to see if their results last as long as the benefits from surgery do.
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these procedures have allowed many people too old or frail for an operation to get help for problems that otherwise would likely kill them
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You can do these on 90-year-old patients
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also offer an option for people who cannot tolerate long-term use of blood thinners or other drugs to manage their conditions
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Heart valves
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Millions of people have leaky heart valves. Each year, more than 100,000 people in the United States alone have surgery for them
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Without a valve replacement operation, half of these patients die within two years, yet many are too weak to have one.
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just over a year ago,
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Edwards Lifesciences Corp. won approval to sell an artificial aortic valve flexible and small enough to fit into a catheter and be wedged inside the bad one
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At first it was just for inoperable patients. Last fall, use was expanded to include people able to have surgery but at high risk of complications.
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Catheter-based treatments for other valves also are in testing. One for the mitral valve
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mixed review by federal Food and Drug Administration advisers this week; whether it will win FDA approval is unclear. It is already sold in Europe
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Heart rhythm problems
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Catheters can contain tools to vaporize or "ablate" bits of heart tissue that cause abnormal signals that control the heartbeat
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Now catheter ablation is being used for the most common rhythm problem—atrial fibrillation, which plagues about 3 million Americans and 15 million people worldwide.
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Ablation addresses the underlying rhythm problem. To address the stroke risk from pooled blood, several novel devices aim to plug or seal off the pouch
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The upper chambers of the heart quiver or beat too fast or too slow. That lets blood pool in a small pouch off one of these chambers
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Clots can form in the pouch and travel to the brain, causing a stroke
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a tiny lasso to cinch the pouch shut. It uses two catheters that act like chopsticks. One goes through a blood vessel and into the pouch to help guide placement of the device, which is contained in a second catheter poked under the ribs to the outside of the heart. A loop is released to circle the top of the pouch where it meets the heart, sealing off the pouch.
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A different kind of device
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sold in Europe and parts of Asia, but is pending before the FDA in the U.S
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like a tiny umbrella pushed through a vein and then opened inside the heart to plug the troublesome pouch.
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Early results from a pivotal study released by the company suggested it would miss a key goal, making its future in the U.S. uncertain.
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Heart defects
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St. Jude Medical Inc.'s Amplatzer is a fabric-mesh patch threaded through catheters to plug the hole
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In two new studies, the device did not meet the main goal of lowering the risk of repeat strokes in people who had already suffered one, but some doctors were encouraged by other results
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Сlogged arteries
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The original catheter-based treatment—balloon angioplasty—is still used hundreds of thousands of times each year in the U.S. alone
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A Japanese company, Terumo Corp., is one of the leaders of a new way to do it that is easier on patients—through a catheter in the arm rather than the groin
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Newer stents that prop arteries open and then dissolve over time, aimed at reducing the risk of blood clots, also are in late-stage testing
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High blood pressure
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About
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1 billion people worldwide have high blood pressure, a major risk factor for heart attacks
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Researchers are testing a possible long-term fix for dangerously high pressure that can't be controlled with multiple medications.
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uses a catheter and radio waves to zap nerves, located near the kidneys, which fuel high blood pressure
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At least one device is approved in Europe and several companies are testing devices in the United States